CN217485673U - Cylindrical battery - Google Patents
Cylindrical battery Download PDFInfo
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- CN217485673U CN217485673U CN202221353606.XU CN202221353606U CN217485673U CN 217485673 U CN217485673 U CN 217485673U CN 202221353606 U CN202221353606 U CN 202221353606U CN 217485673 U CN217485673 U CN 217485673U
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- negative electrode
- negative
- top cover
- shell
- cylindrical battery
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Connection Of Batteries Or Terminals (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The utility model belongs to the technical field of the battery, a cylinder battery is disclosed, including casing, book core, anodal utmost point post, negative pole top cap, sealed pad, sheetmetal, negative pole switching piece and negative pole current collector dish. An opening is arranged at one end of the shell. The roll core is arranged in the shell. The positive pole column is arranged at one end of the shell, which is positioned at the positive pole of the winding core, and is electrically connected with the positive pole of the winding core. The negative pole top cap is connected in the opening, and the negative pole top cap is connected with the negative pole electricity of rolling up the core. The sealing gasket is arranged between the connecting part of the negative electrode top cover and the shell. One end of the metal sheet is clamped between the sealing gasket and the negative electrode top cover, and the other end of the metal sheet is clamped between the sealing gasket and the shell, so that the negative electrode top cover is electrically connected with the shell, and the negative electrode top cover is electrically connected with the shell under the condition that the sealing between the negative electrode top cover and the shell is not influenced. The negative pole top cap is electrically connected with the roll core, and the positive pole column is arranged at one end of the shell, which is positioned at the positive pole of the roll core, and is electrically connected with the positive pole of the roll core, so that the positive pole and the negative pole of the cylindrical battery are at the same side.
Description
Technical Field
The utility model relates to a battery technology field especially relates to a cylinder battery.
Background
The cylindrical battery is one of important product forms of a new energy power battery, and has a large number of applications in new energy automobiles due to high energy density and low manufacturing cost. The mechanical roller groove and the turned edge matched sealing gasket are used for packaging the cylindrical battery, so that not only can the sealing between the shell and the cover plate be realized, but also the insulation between the shell and the cover plate can be realized, and the mechanical roller groove and the turned edge matched sealing gasket are widely applied to the packaging process of the cylindrical battery. With the increasing demand of energy density after the power batteries are grouped, the demand of the power battery module assembly on the same side of the positive electrode and the negative electrode of the batteries is increased gradually (namely, the positive electrode and the negative electrode are on the same side of the batteries), and the cylindrical batteries packaged by adopting the roller slots can prevent the negative electrode from being led to one side of the positive electrode from the steel shell due to the insulation effect between the cover plate and the shell, thereby influencing the realization of the same side of the positive electrode and the negative electrode of the cylindrical batteries.
Therefore, a cylindrical battery is needed to solve the above problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a cylindrical battery realizes under the sealed condition between negative pole top cap and the casing that the negative pole top cap is connected with the electricity of casing not influencing to realize the assembly of the positive negative pole homonymy of cylindrical battery, the power battery module of being convenient for.
To achieve the purpose, the utility model adopts the following technical proposal:
a cylindrical battery comprising:
a housing having an opening at one end;
a winding core disposed in the housing;
the positive pole column is arranged at one end of the shell positioned at the positive pole of the winding core and is electrically connected with the positive pole of the winding core;
the negative electrode top cover is connected to the opening and is electrically connected with the negative electrode of the winding core;
the sealing gasket is arranged between the connecting part of the negative pole top cover and the shell;
and one end of the metal sheet is clamped between the sealing gasket and the negative electrode top cover, and the other end of the metal sheet is clamped between the sealing gasket and the shell.
Preferably, the winding core further comprises a negative electrode adapter sheet, one end of the negative electrode adapter sheet is electrically connected with the negative electrode of the winding core, and the other end of the negative electrode adapter sheet is electrically connected with the negative electrode top cover.
Preferably, still include negative pole current collection dish, its one side with the negative pole ear welded fastening who rolls up the core, the negative pole keysets one end with negative pole current collection dish welded fastening, the other end with negative pole top cap welded fastening.
Preferably, a roller groove is formed in one end, located at the negative electrode of the winding core, of the shell, and the roller groove is arranged around the shell, so that the winding core is fixedly arranged in the shell.
Preferably, the sealing gasket is coated on the edge of the negative pole top cover along the circumferential direction of the negative pole top cover, the end part of the shell, which is provided with the end of the opening, is bent inwards to form a bent part, and the negative pole top cover and the sealing gasket are clamped between the bent part and the part of the shell, which is located above the roller groove.
Preferably, the metal sheet is arranged around the negative electrode top cover along the circumferential direction of the negative electrode top cover.
Preferably, the winding structure further comprises a positive electrode current collecting disc, one side of the positive electrode current collecting disc is welded with the positive electrode lug of the winding core, one end of the positive electrode pole is welded and fixed with the positive electrode current collecting disc, and the other end of the positive electrode pole is exposed out of the shell.
Preferably, one side of the positive electrode current collecting disc, which is far away from the winding core, is provided with a groove, and one end of the positive electrode pole extends into the groove.
Preferably, the sealing device further comprises a sealing ring sleeved on the positive pole column, and the sealing ring is clamped between the positive pole column and the shell to seal a gap between the positive pole column and the shell.
Preferably, the lithium ion battery further comprises an insulation limiting component sleeved on the positive pole, and the insulation limiting component enables the positive pole to be arranged at intervals with the shell.
The utility model has the advantages that:
the utility model provides a cylindrical battery, sheetmetal one end clamp is located between sealed pad and the negative pole top cap, the other end clamp is located between sealed pad and the casing, so that the negative pole top cap is connected with the casing electricity, thereby realize the electricity of negative pole top cap and casing under the sealed circumstances between negative pole top cap and the casing and be connected, the negative pole top cap is connected with rolling up a core electricity, thereby make the casing as cylindrical battery's negative pole, and anodal utmost point post sets up and is located the anodal one end of rolling up a core in the casing, and with the anodal electricity of rolling up a core and be connected, thereby realize the positive negative pole homonymy of cylindrical battery, the assembly of the power battery module of being convenient for.
Drawings
Fig. 1 is a cross-sectional view of a cylindrical battery provided by an embodiment of the present invention;
fig. 2 is a partially enlarged view of a portion a in fig. 1.
In the figure:
11. a housing; 111. a roller groove; 112. a bending section;
12. a winding core;
13. a positive pole column;
14. a negative electrode top cover; 141. a columnar bulge;
15. a gasket; 16. a metal sheet; 17. a negative pole switching piece; 18. a negative current collecting plate; 19. a positive current collector; 20. a seal ring;
21. an insulating limit component; 211. an upper insulation limit part; 2111. a first insulation limiting part; 2112. a second insulation limiting part; 212. and a lower insulation limit member.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present application, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation of the first and second features not being in direct contact, but being in contact with another feature between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to be limiting.
As shown in fig. 1 and 2, the present embodiment provides a cylindrical battery including a case 11, a winding core 12, a positive electrode post 13, a negative electrode top cover 14, a gasket 15, a metal sheet 16, a negative electrode tab 17, and a negative electrode current collecting plate 18. An opening is provided at one end of the housing 11. The winding core 12 is provided in the case 11. The positive pole column 13 is arranged at one end of the shell 11, which is positioned at the positive pole of the winding core 12, and is electrically connected with the positive pole of the winding core 12. The negative electrode top cap 14 is attached to the opening, and the negative electrode top cap 14 is electrically connected to the negative electrode of the jelly roll 12. The gasket 15 is provided between the connecting portion of the negative electrode top cover 14 and the case 11. One end of the metal sheet 16 is interposed between the gasket 15 and the negative electrode top cover 14, and the other end is interposed between the gasket 15 and the case 11.
In the cylindrical battery provided by this embodiment, one end of the metal sheet 16 is clamped between the sealing gasket 15 and the negative electrode top cap 14, and the other end of the metal sheet is clamped between the sealing gasket 15 and the casing 11, so that the negative electrode top cap 14 is electrically connected with the casing 11, thereby achieving the electrical connection between the negative electrode top cap 14 and the casing 11 without affecting the sealing between the negative electrode top cap 14 and the casing 11, and the negative electrode top cap 14 is electrically connected with the winding core 12, thereby enabling the casing 11 to serve as the negative electrode of the cylindrical battery, and the positive electrode post 13 is disposed at one end of the casing 11, which is located at the positive electrode of the winding core 12, and is electrically connected with the positive electrode of the winding core 12, thereby achieving the same side of the positive electrode and the negative electrode of the cylindrical battery, and facilitating the assembly of the power battery module.
Optionally, the cylindrical battery provided in this embodiment further includes a negative electrode adaptor sheet 17, one end of which is electrically connected to the negative electrode of the winding core 12, and the other end of which is electrically connected to the negative electrode top cap 14. The negative electrode adaptor piece 17 is provided to electrically connect the negative electrode top caps 14 arranged at intervals to the negative electrode of the winding core 12.
Optionally, as shown in fig. 1, the cylindrical battery provided in this embodiment further includes an anode current collecting disk 18, one side of which is welded and fixed to the anode of the winding core 12, and the anode current collecting disk 18 is welded to the anode tab by laser spot welding. One end of the negative adapter sheet 17 is welded and fixed with the negative current collecting disc 18, and the other end of the negative adapter sheet is welded and fixed with the negative top cover 14, so that the negative adapter sheet 17 can be stably communicated with the negative current collecting disc 18 and the negative top cover 14, and the overcurrent capacity of the negative adapter sheet 17 is improved. In the production process of the cylindrical battery, after the roller groove 111 is processed, one end of the adapter sheet 17 is welded to the negative current collecting disc 18 through laser spot welding, the other end of the adapter sheet 17 is welded to the negative top cover 14 through laser spot welding, then the negative top cover 14 is covered on the opening of the shell 11 to seal the space between the negative top cover 14 and the shell 11, the adapter sheet 17 used on the cylindrical battery is a metal sheet, and the adapter sheet 17 and the negative top cover 14 are moved after welding is completed, so that the welding position of the adapter sheet 17 and the negative top cover 14 cannot be broken when the negative top cover 14 is moved. The welding mode of the adapter plate 17 in this embodiment solves the problem that the nickel plating layer of the negative electrode top cover 14 is damaged and easily rusts because the negative electrode top cover 14 is firstly covered on the opening of the shell 11 and then the negative electrode top cover 14 and the adapter plate 17 are connected by laser penetration welding.
Alternatively, as shown in fig. 1, a roller groove 111 is provided at one end of the shell 11 located at the negative electrode of the winding core 12, the roller groove 111 is disposed around the shell 11, so that the winding core 12 is fixedly disposed in the shell 11, and the winding core 12 is limited in the shell 11 by the roller groove 111 provided on the shell 11.
Alternatively, as shown in fig. 1 and fig. 2, the sealing gasket 15 is wrapped around the edge of the negative top cap 14 along the circumferential direction of the negative top cap 14, the end portion of the open end of the casing 11 is bent inward to form a bent portion 112, and the negative top cap 14 and the sealing gasket 15 are sandwiched between the bent portion 112 and the portion of the casing 11 above the roller groove 111. The clamping force of the bent portion 112 and the part of the case 11 located above the roller groove 111 to the gasket 15 realizes the sealing of the gasket 15 to the gap between the negative electrode top cover 14 and the case 11. The gasket 15 has elasticity, when the cylindrical battery is produced, the gasket 15 is elastically deformed by the clamping force of the part of the bent portion 112 and the housing 11 above the roller groove 111 on the gasket 15, and when the cylindrical battery is used, the elasticity of the gasket 15 can ensure that the metal sheet 16 clamped between the gasket 15 and the negative electrode top cover 14 and between the gasket 15 and the housing 11 is always kept in close contact with the negative electrode top cover 14 and the housing 11, and even if the bent portion 112 is slightly elastically deformed due to the vibration of the cylindrical battery, the metal sheet 16 cannot be poorly contacted with the negative electrode top cover 14 or the housing 11 due to the small elastic deformation of the bent portion 112 due to the rebound of the gasket 15.
Optionally, as shown in fig. 1, the metal sheet 16 is disposed around the negative electrode top cover 14 along the circumferential direction of the negative electrode top cover 14 to increase the contact area between the metal sheet 16 and the case 11 and between the metal sheet 16 and the negative electrode top cover 14, so as to increase the overcurrent capacity.
Optionally, as shown in fig. 1 and fig. 2, the metal sheet 16 is disposed on a side of the negative electrode top cover 14 away from the winding core 12, a columnar protrusion 141 is disposed in a middle portion of the side of the negative electrode top cover 14 away from the winding core 12, and the metal sheet 16 abuts against a side wall of the columnar protrusion 141, so as to further increase a contact area between the metal sheet 16 and the negative electrode top cover 14.
Optionally, as shown in fig. 1, the cylindrical battery provided by this embodiment further includes a positive current collecting disc 19, one side of which is welded to the positive tab of the winding core 12, specifically, in this embodiment, the positive current collecting disc 19 is connected to the positive tab of the winding core 12 by laser spot welding. One end of the positive pole column 13 is welded and fixed with the positive current collecting disc 19, and the other end is exposed out of the shell 11. Specifically, in this embodiment, an end surface of the casing 11 near one end of the positive current collecting plate 19 is provided with a mounting hole, the positive electrode post 13 is riveted to the casing 11 through the mounting hole, and the welding mode between the positive electrode post 13 and the positive current collecting plate 19 is resistance welding.
Optionally, a groove is formed in a side, away from the winding core 12, of the positive electrode current collecting disc 19, and one end of the positive electrode post 13 extends into the groove, so that the connection between the positive electrode post 13 and the positive electrode current collecting disc 19 is more stable.
Optionally, the cylindrical battery provided in this embodiment further includes a sealing ring 20 sleeved on the positive electrode post 13, and the sealing ring 20 is interposed between the positive electrode post 13 and the casing 11 to seal a gap between the positive electrode post 13 and the casing 11, so as to prevent the electrolyte in the casing 11 from leaking.
Optionally, the cylindrical battery provided in this embodiment further includes an insulating limiting component 21 sleeved on the positive electrode post 13, and the insulating limiting component 21 makes the positive electrode post 13 and the casing 11 spaced apart from each other, so as to avoid the positive electrode current collecting plate 19 and the positive electrode post 13 from contacting the casing 11 to cause a short circuit of the cylindrical battery.
Optionally, as shown in fig. 1, the insulation limiting assembly 21 includes an upper insulation limiting member 211 and a lower insulation limiting member 212. The upper insulation limiting piece 211 is sleeved on the positive pole post 13, the upper insulation limiting piece 211 comprises a first insulation limiting portion 2111 and a second insulation limiting portion 2112 fixedly connected with the first insulation limiting portion 2111, the first insulation limiting portion 2111 is clamped between the positive pole post 13 and the inner wall of the casing 11 and between the positive current collecting plate 19 and the inner wall of the casing 11, and the second insulation limiting portion 2112 extends into the mounting hole. The lower insulation limiting member 212 is sleeved on the positive pole post 13, and the lower insulation limiting member 212 is clamped between the positive pole post 13 and the outer wall of the housing 11. Specifically, in the present embodiment, the upper insulation limiting member 211 and the lower insulation limiting member 212 are made of plastic material.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A cylindrical battery, comprising:
a housing (11) having an opening at one end;
a winding core (12) provided in the case (11);
the positive pole column (13) is arranged at one end, located at the positive pole of the winding core (12), of the shell (11) and is electrically connected with the positive pole of the winding core (12);
a negative electrode top cover (14) connected to the opening, wherein the negative electrode top cover (14) is electrically connected with the negative electrode of the winding core (12);
the sealing gasket (15) is arranged between the connecting part of the negative electrode top cover (14) and the shell (11);
and a metal sheet (16) having one end interposed between the gasket (15) and the negative electrode top cover (14) and the other end interposed between the gasket (15) and the case (11).
2. The cylindrical battery according to claim 1, further comprising a negative electrode adaptor sheet (17) having one end electrically connected to the negative electrode of the jelly roll (12) and the other end electrically connected to the negative electrode top cap (14).
3. The cylindrical battery according to claim 2 further comprises a negative electrode current collecting disc (18), one side of the negative electrode current collecting disc is welded and fixed with the negative electrode lug of the winding core (12), one end of the negative electrode adapter sheet (17) is welded and fixed with the negative electrode current collecting disc (18), and the other end of the negative electrode adapter sheet is welded and fixed with the negative electrode top cover (14).
4. The cylindrical battery according to claim 1, wherein the end of the shell (11) at the negative pole of the winding core (12) is provided with a roller groove (111), and the roller groove (111) is arranged around the shell (11) to fix the winding core (12) in the shell (11).
5. The cylindrical battery according to claim 4, wherein the sealing gasket (15) is wrapped on the edge of the negative top cover (14) along the circumferential direction of the negative top cover (14), the end of the casing (11) where the opening is arranged is bent inward to form a bent portion (112), and the negative top cover (14) and the sealing gasket (15) are sandwiched between the bent portion (112) and the part of the casing (11) above the roller groove (111).
6. Cylindrical battery according to claim 5, characterized in that the metal sheet (16) is arranged around the negative top cover (14) in the circumferential direction of the negative top cover (14).
7. The cylindrical battery according to claim 1, further comprising a positive electrode current collecting disc (19), one side of which is welded to the positive electrode tab of the winding core (12), one end of the positive electrode pole (13) is welded and fixed to the positive electrode current collecting disc (19), and the other end of which is exposed out of the case (11).
8. The cylindrical battery according to claim 7, wherein a groove is formed in the side of the positive electrode current collecting disc (19) far away from the winding core (12), and one end of the positive electrode pole (13) extends into the groove.
9. The cylindrical battery according to claim 8, further comprising a sealing ring (20) sleeved on the positive electrode post (13), wherein the sealing ring (20) is sandwiched between the positive electrode post (13) and the housing (11) to seal a gap between the positive electrode post (13) and the housing (11).
10. The cylindrical battery according to claim 9 further comprises an insulation limiting component (21) sleeved on the positive pole post (13), wherein the insulation limiting component (21) enables the positive pole post (13) and the shell (11) to be arranged at intervals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221353606.XU CN217485673U (en) | 2022-05-31 | 2022-05-31 | Cylindrical battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221353606.XU CN217485673U (en) | 2022-05-31 | 2022-05-31 | Cylindrical battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217485673U true CN217485673U (en) | 2022-09-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221353606.XU Active CN217485673U (en) | 2022-05-31 | 2022-05-31 | Cylindrical battery |
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| Country | Link |
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| CN (1) | CN217485673U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115911691A (en) * | 2023-03-14 | 2023-04-04 | 广汽埃安新能源汽车股份有限公司 | Top cap subassembly, battery monomer and power battery package |
| WO2023216505A1 (en) * | 2022-05-12 | 2023-11-16 | 湖北亿纬动力有限公司 | Battery |
-
2022
- 2022-05-31 CN CN202221353606.XU patent/CN217485673U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023216505A1 (en) * | 2022-05-12 | 2023-11-16 | 湖北亿纬动力有限公司 | Battery |
| CN115911691A (en) * | 2023-03-14 | 2023-04-04 | 广汽埃安新能源汽车股份有限公司 | Top cap subassembly, battery monomer and power battery package |
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